Mechanism and method for cemmenting double leather belts



July 11, 1933. w s. GRIFFITH 1,917,296

MECHANISM AND METHOD FOR CEMENTING DOUBLE LEATHER BELTS Filed April 26, 1929 2 Sheets-Sheet l W/E? d f/W 59. I, day-M s July 11, 1933. w. s. GRIFFITH MECHANISM AND METHOD FOR CEMENTING DOUBLE LEATHER BELTS 2 Sheets- Sheet Filed April 26, 1929 of leather belts in which two PM July 11,1933

UNITED STATES.

PATENT oFFlcE s. eamrrra, or woncssraa, IASSAOBUBEM'B, assronon. 'ro euro: a memconm, or we nssacnusms, a comaarror or ussaonvsms um mon 103 DIG DOUBLE BELTS Application m April as, less. Serial ire. macs.

This invention relates to the manufacture (previously to ether formed .single beltsare cemente n the to form a belt of double thickness.

manufacture of such belts, it is particularly essential that the edges of the sin le belt layers shall be firmly secured to eac other as any crack or opening along the edges of the double belt detracts seriously from its value.

It is the general object of my invention to provide a mechanism by which an increased pressure is applied to the edge portions of the double belt while the cement is setting, caus ing more firm adherence of the edge portions to each other.

A further object of the invention is to .provide an improved method of cementing belts by which more acceptable results may be attained.

. My invention further relates to arrangements and combinations of parts which will be hereinafter described and more particularly pointed out in the ap ended claims. preferred form of t e invention is shown in the drawin in, which Fig. 1 is a side elevation, partly, in section, of portions of a belt cementing machine adapted for the carrying out of my invention;

Fig. 2 is an enlarged plan view .of certain parts shown in'Fig. 1;

Fig. 3 isa detail sectional view of tion of'the roll of belt; and

Fig. 4 is a view similar to Fig. 3 but showin an additional use of the invention.

f teferring to the drawings, I have shown upper and lower belt layers A and A each referably formed of single ply stri s of eather having their overlapping skive ends cemented or glued together to form a continuous single belt. The belt layers A and A v are fed between drawing rolls 10 and resser rolls 12 and after passing through tie machine, the double belt B is wound on a drum 15. I a As the layers A and A approach the drawing rolls 10, a layer of celluloid C is drawn a porproviding the necessary cementing material to secure the layers firmly together.

The drum 15 is preferabl rovided with wings or guidemembers 20, 0 ted in spaced relat1on on the periphery of the drum and also ad ustable axiall m accordance with the width of the belt tobe Suitable driving mechanism (not shown) is provided for frictionally rotating the drum 15,-wmdm the belt thereon under relatively wound on the drum.

heavy tension exerted a ainst the retarding action of the friction to Is 12.

A main ob'ect of m invention, as previously state is to re atively increase the ressure applied to the edge portions of the It as 1t is wound on the drum 15." For this purpose I provide spools S (Fi 2; rotatably mounted on a cross rod 25 andiel in s aced relation by collars 26. Strips of tape are drawn from the s ools S and are guided around a cross bar 2 and under ide-rolls 28 mounted on a cross shaft 30. T e guide-rolls 28 are ooved to receive the ta set screws 32. The shaft 30 is freely rotatable by the friction of the tapes as they are drawn under the guide-rolls 28.

Having described the essential features of my invention, the method of operation and bite of the belt as it is wound on the roll and adjacent the extreme edge portions thereof. As the winding of thebelt continues, the

s T and are secure in spaced relation on t e shaft 30 by.

; tapes are fed accurately by the guide-rolls 28 to the edge portions of the belt B, so that the roll of belt is relatively thickened at the exaggerated scale in Fig. 3. It is evident edge portions, as indicated on a somewhat.

that the winding tension and pressure is exerted very largely at the extreme edge portime (if the belt B. at t Points where is or; I

tapes T are inserted. while the middle tions of the belt are under relatively light pressure.

The belt is allowed to remain on tlfe drum 7 V 15 until the cement has fully set. The setting ofthe cement with the edges under excem pressure practically eliminates the formation of cracks or openings along the edges of the completed belt, thus avoiding the production of seconds and substantially increasing the value of the belt.

As the belt is unwound from the drum 15,-

after the cement has fully set, the tapes T are recovered and rewound on spools S and may be used over and over. The tapes T may be of fabric or paper or'of any other suitable material by which the edges of the belt will be appreciably separated as the belt is wound' on the roll. a

It sometimes happens that a wide belt B (Fig. 4) made to. include the center or back bone portions of the hides will be thicker at the edges and thinner at the center, in which case a tape T' inserted between the belt layers at the center will be advantageous in securing more complete adherence of the cemented layers to each other.

While I have described the belt as being cemented by the insertion of a strip of celluloid or pyroxylin, my improved mechanism is equally applicable tobelts cemented by the application of glue-or other suitable cementing material.

Having thus described my invention and the advantages thereof, I do not wish to be limited to the details herein disclosed, otherwise than as set forth in the claims, but what 1. In a belt cementing machine, means to cement strips of leather together to form a double belt, means to wind said cemented belt into a tight roll iand means to insert two strips of relatively'thin fiexlble materlal between successive layers in said roll of belt, said strips being inserted along the two edge portions only of said belt and causing localized ressure to be applied-thereto.

2. In a belt cementing machine, means to cement stripsof leather together to form a double belt, means to wind said cemented belt into a tight roll, and means to insert a separate strip of tape along each edge por: tion of said belt as it is wound on said roll, said tapes being thereby disposed between successive belt layers and causinglocalized pressure to be applied thereto.

3. In a belt cementing machine, means to cement strips of leather together to form a double belt, means to wind said cemented belt into a tight roll, means to provide storage for a plurality of tapes in said machine, and means to guide portions of separate and spaced tapes between the outer edge portions only of adjacent belt layers in said roll, thereby causing localized pressure to be applied thereto. p

4. In a belt cementing machine, means to ,only of said belt and between adjacent layers thereof in said roll, thereby causing localized pressure to be applied thereto.

5. The method of making sists in cementingwtogether strips of leather to form a double elt, pressing said cemented belt, winding said cemented belt in a tight roll, and applying substantially greater pressure to the edge portions of said wound belt than to the portions inwardly removed therefrom while the cement is setting.

6. The method of making belts which consists in cementin together strips of leather to form a double elt, pressing said cemented belt, winding said cemented belt in a roll under tension, and appl ing substantially greater ressure to the e ge portions of said wound elt than to the portions inwardly belts whichtion- A removed therefrom, as'said belt is wound on I said roll.

7. The method of making belts which consists in cementin together strips of leather to form a double elt, pressing said cemented strips together, winding said cemented belt in a tight roll, and in substantially supporting each' layer of belt in said roll by its edge portions only.

8. The method of making belts which consists in cementing together strips of leather to form a double belt, pressing said cemented belt, winding said cemented belt in a roll, and in causing the pressure of said belt layers on each other in said roll to be increased between selected and transversely separated longitudinally portions of said strips.

9. In a belt cementing machine, means to cement strips of leather together to form a double belt, means to wind said cemented belt, into a tight roll, and means to insert separate spaced strips of tape between selected portions of sald belt as said belt is wound into a roll, said tape being thereby disposed along transversely spaced longitudinal lines between successive belt layers, and causing 1ocalized pressure to be applied thereto.

10. The method of making belts which consists in cementing to ether strips of leather to form a multi-ply 1t, pressing said cemented belt, and winding said cemented belt into .a roll under tension with a definitely increased and localized pressure exerted between individual convolutions of the roll, the area of localized pressure spiraling in a plane generally normal to the axis of the roll.

In testimony whereof I have hereunto aftixed my signature.

III

comment-z or CORRECTION.

Patent No. 1,917,296. I r July 11. 1933.

wmrnnn s. onirrl m.

It is hereby certified that error appears in the printed specification of the above numbered patent requiring correction as follows: Page 2, line 99, claim 8, after "roll" insert the words "under tension"; and that the said Letters Patent should be read with this correction therein that the same may conform to the record of the case in the Patent Office.

Signed and sealed this 22nd day of August, A. D. 1933.

i M. J. Moore.

(Seal) 1 Acting Commissioner of Patents. 

